// Created on: 2016-04-19
// Copyright (c) 2016 OPEN CASCADE SAS
// Created by: Oleg AGASHIN
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#include <BRepMesh_ShapeTool.hxx>
#include <IMeshData_Edge.hxx>
#include <IMeshData_PCurve.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <BRep_Tool.hxx>
#include <BRep_Builder.hxx>
#include <ShapeAnalysis_Edge.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <Precision.hxx>
#include <Bnd_Box.hxx>
namespace
{
//! Auxilary struct to take a tolerance of edge.
struct EdgeTolerance
{
static Standard_Real Get(const TopoDS_Shape& theEdge)
{
return BRep_Tool::Tolerance(TopoDS::Edge(theEdge));
}
};
//! Auxilary struct to take a tolerance of vertex.
struct VertexTolerance
{
static Standard_Real Get(const TopoDS_Shape& theVertex)
{
return BRep_Tool::Tolerance(TopoDS::Vertex(theVertex));
}
};
//! Returns maximum tolerance of face element of the specified type.
template<TopAbs_ShapeEnum ShapeType, class ToleranceExtractor>
Standard_Real MaxTolerance(const TopoDS_Face& theFace)
{
Standard_Real aMaxTolerance = RealFirst();
TopExp_Explorer aExplorer(theFace, ShapeType);
for (; aExplorer.More(); aExplorer.Next())
{
Standard_Real aTolerance = ToleranceExtractor::Get(aExplorer.Current());
if (aTolerance > aMaxTolerance)
aMaxTolerance = aTolerance;
}
return aMaxTolerance;
}
}
//=======================================================================
//function : MaxFaceTolerance
//purpose :
//=======================================================================
Standard_Real BRepMesh_ShapeTool::MaxFaceTolerance(const TopoDS_Face& theFace)
{
Standard_Real aMaxTolerance = BRep_Tool::Tolerance(theFace);
Standard_Real aTolerance = Max(
MaxTolerance<TopAbs_EDGE, EdgeTolerance >(theFace),
MaxTolerance<TopAbs_VERTEX, VertexTolerance>(theFace));
return Max(aMaxTolerance, aTolerance);
}
//=======================================================================
//function : BoxMaxDimension
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::BoxMaxDimension(const Bnd_Box& theBox,
Standard_Real& theMaxDimension)
{
if (theBox.IsVoid())
return;
Standard_Real aMinX, aMinY, aMinZ, aMaxX, aMaxY, aMaxZ;
theBox.Get(aMinX, aMinY, aMinZ, aMaxX, aMaxY, aMaxZ);
theMaxDimension = Max(aMaxX - aMinX, Max(aMaxY - aMinY, aMaxZ - aMinZ));
}
//=======================================================================
//function : CheckAndUpdateFlags
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::CheckAndUpdateFlags (
const IMeshData::IEdgeHandle& theEdge,
const IMeshData::IPCurveHandle& thePCurve)
{
if (!theEdge->GetSameParam () &&
!theEdge->GetSameRange () &&
theEdge->GetDegenerated ())
{
// Nothing to do worse.
return;
}
const TopoDS_Edge& aEdge = theEdge->GetEdge ();
const TopoDS_Face& aFace = thePCurve->GetFace ()->GetFace ();
Handle (Geom_Curve) aCurve;
Standard_Real aFirstParam, aLastParam;
Range (aEdge, aCurve, aFirstParam, aLastParam);
if (aCurve.IsNull())
{
theEdge->SetDegenerated(Standard_True);
return;
}
BRepAdaptor_Curve aCurveOnSurf(aEdge, aFace);
if (theEdge->GetSameParam () || theEdge->GetSameRange ())
{
if (theEdge->GetSameRange ())
{
const Standard_Real aDiffFirst = aCurveOnSurf.FirstParameter () - aFirstParam;
const Standard_Real aDiffLast = aCurveOnSurf.LastParameter () - aLastParam;
theEdge->SetSameRange (
Abs (aDiffFirst) < Precision::PConfusion () &&
Abs (aDiffLast ) < Precision::PConfusion ());
if (!theEdge->GetSameRange())
{
theEdge->SetSameParam(Standard_False);
}
}
}
if (!theEdge->GetDegenerated ()/* || theEdge->GetSameParam ()*/)
{
TopoDS_Vertex aStartVertex, aEndVertex;
TopExp::Vertices (aEdge, aStartVertex, aEndVertex);
if (aStartVertex.IsNull() || aEndVertex.IsNull())
{
theEdge->SetDegenerated(Standard_True);
return;
}
if (aStartVertex.IsSame(aEndVertex))
{
const Standard_Integer aPointsNb = 20;
const Standard_Real aVertexTolerance = BRep_Tool::Tolerance (aStartVertex);
const Standard_Real aDu = (aLastParam - aFirstParam) / aPointsNb;
//const Standard_Real aEdgeTolerance = BRep_Tool::Tolerance (aEdge);
//const Standard_Real aSqEdgeTolerance = aEdgeTolerance * aEdgeTolerance;
gp_Pnt aPrevPnt;
aCurve->D0 (aFirstParam, aPrevPnt);
Standard_Real aLength = 0.0;
for (Standard_Integer i = 1; i <= aPointsNb; ++i)
{
const Standard_Real aParameter = aFirstParam + i * aDu;
// Calculation of the length of the edge in 3D
// in order to check degenerativity
gp_Pnt aPnt;
aCurve->D0 (aParameter, aPnt);
aLength += aPrevPnt.Distance (aPnt);
//if (theEdge->GetSameParam ())
//{
// // Check that points taken at the 3d and pcurve using
// // same parameter are within tolerance of an edge.
// gp_Pnt aPntOnSurf;
// aCurveOnSurf.D0 (aParameter, aPntOnSurf);
// theEdge->SetSameParam (aPnt.SquareDistance (aPntOnSurf) < aSqEdgeTolerance);
//}
if (aLength > aVertexTolerance /*&& !theEdge->GetSameParam()*/)
{
break;
}
aPrevPnt = aPnt;
}
theEdge->SetDegenerated (aLength < aVertexTolerance);
}
}
}
//=======================================================================
//function : AddInFace
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::AddInFace(
const TopoDS_Face& theFace,
Handle(Poly_Triangulation)& theTriangulation)
{
const TopLoc_Location& aLoc = theFace.Location();
if (!aLoc.IsIdentity())
{
gp_Trsf aTrsf = aLoc.Transformation();
aTrsf.Invert();
TColgp_Array1OfPnt& aNodes = theTriangulation->ChangeNodes();
for (Standard_Integer i = aNodes.Lower(); i <= aNodes.Upper(); ++i)
aNodes(i).Transform(aTrsf);
}
BRep_Builder aBuilder;
aBuilder.UpdateFace(theFace, theTriangulation);
}
//=======================================================================
//function : NullifyFace
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::NullifyFace (const TopoDS_Face& theFace)
{
BRep_Builder aBuilder;
aBuilder.UpdateFace (theFace, Handle (Poly_Triangulation)());
}
//=======================================================================
//function : NullifyEdge
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::NullifyEdge (
const TopoDS_Edge& theEdge,
const Handle (Poly_Triangulation)& theTriangulation,
const TopLoc_Location& theLocation)
{
UpdateEdge (theEdge, Handle (Poly_PolygonOnTriangulation)(),
theTriangulation, theLocation);
}
//=======================================================================
//function : NullifyEdge
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::NullifyEdge (
const TopoDS_Edge& theEdge,
const TopLoc_Location& theLocation)
{
BRep_Builder aBuilder;
aBuilder.UpdateEdge (theEdge, Handle (Poly_Polygon3D)(), theLocation);
}
//=======================================================================
//function : UpdateEdge
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::UpdateEdge (
const TopoDS_Edge& theEdge,
const Handle (Poly_PolygonOnTriangulation)& thePolygon,
const Handle (Poly_Triangulation)& theTriangulation,
const TopLoc_Location& theLocation)
{
BRep_Builder aBuilder;
aBuilder.UpdateEdge (theEdge, thePolygon, theTriangulation, theLocation);
}
//=======================================================================
//function : UpdateEdge
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::UpdateEdge (
const TopoDS_Edge& theEdge,
const Handle (Poly_PolygonOnTriangulation)& thePolygon1,
const Handle (Poly_PolygonOnTriangulation)& thePolygon2,
const Handle (Poly_Triangulation)& theTriangulation,
const TopLoc_Location& theLocation)
{
BRep_Builder aBuilder;
aBuilder.UpdateEdge (theEdge, thePolygon1, thePolygon2,
theTriangulation, theLocation);
}
//=======================================================================
//function : UpdateEdge
//purpose :
//=======================================================================
void BRepMesh_ShapeTool::UpdateEdge(
const TopoDS_Edge& theEdge,
const Handle(Poly_Polygon3D)& thePolygon)
{
BRep_Builder aBuilder;
aBuilder.UpdateEdge(theEdge, thePolygon);
}
//=======================================================================
//function : UseLocation
//purpose :
//=======================================================================
gp_Pnt BRepMesh_ShapeTool::UseLocation (
const gp_Pnt& thePnt,
const TopLoc_Location& theLoc)
{
if (theLoc.IsIdentity())
{
return thePnt;
}
return thePnt.Transformed (theLoc.Transformation ());
}
//=======================================================================
//function : UVPoints
//purpose :
//=======================================================================
Standard_Boolean BRepMesh_ShapeTool::UVPoints (
const TopoDS_Edge& theEdge,
const TopoDS_Face& theFace,
gp_Pnt2d& theFirstPoint2d,
gp_Pnt2d& theLastPoint2d,
const Standard_Boolean isConsiderOrientation)
{
Handle (Geom2d_Curve) aCurve2d;
Standard_Real aFirstParam, aLastParam;
if (!Range(theEdge, theFace, aCurve2d, aFirstParam, aLastParam, isConsiderOrientation))
{
return Standard_False;
}
aCurve2d->D0 (aFirstParam, theFirstPoint2d);
aCurve2d->D0 (aLastParam, theLastPoint2d);
return Standard_True;
}
//=======================================================================
//function : Range
//purpose :
//=======================================================================
Standard_Boolean BRepMesh_ShapeTool::Range (
const TopoDS_Edge& theEdge,
const TopoDS_Face& theFace,
Handle (Geom2d_Curve)& thePCurve,
Standard_Real& theFirstParam,
Standard_Real& theLastParam,
const Standard_Boolean isConsiderOrientation)
{
ShapeAnalysis_Edge aEdge;
return aEdge.PCurve (theEdge, theFace, thePCurve,
theFirstParam, theLastParam,
isConsiderOrientation);
}
//=======================================================================
//function : Range
//purpose :
//=======================================================================
Standard_Boolean BRepMesh_ShapeTool::Range (
const TopoDS_Edge& theEdge,
Handle (Geom_Curve)& theCurve,
Standard_Real& theFirstParam,
Standard_Real& theLastParam,
const Standard_Boolean isConsiderOrientation)
{
ShapeAnalysis_Edge aEdge;
return aEdge.Curve3d (theEdge, theCurve,
theFirstParam, theLastParam,
isConsiderOrientation);
}